<!DOCTYPE html>
<html lang="en" xmlns:th="http://www.thymeleaf.org">
<head>
    <meta charset="UTF-8">
    <title>XSS Demo</title>
</head>
<body>
<h1>输入内容</h1>
<form action="/submit" method="post">
    <input type="text" name="input" />
    <button type="submit">提交</button>
</form>
</body>
</html>